生まれ変わったら

if (I) were reborn, if (I) were born again

→ 生まれ変わる
生まれ to be born + 変わっ change, become different + たら Conditional (“if/when”)
verb · informal Rare #45,621
if (I) were reborn, if (I) were born again Often used to talk about what someone would want to be or do in another life.
JA: 生まれ変わったら、海の近くに住みたい。
EN: If I were reborn, I’d like to live near the sea.
Conjugation of 生まれ変わる
Conditional
生まれ変わったら

生まれ変わったらカナダ人になりたい。

If I’m reincarnated, I want to be Canadian.

生まれ変わったら猫になりたい。

If I’m reincarnated, I want to be a cat.

生まれ変わったら、ミュージシャンになりたいな。

If I’m reborn, I’d like to be a musician.

生まれ変わったらヴァイオリン習いたい。

If I were reborn, I’d want to learn to play the violin.